I had a similar experience with the update KB5005463 on my Windows machine. Initially, I noticed lag and some apps were not functioning as they used to. To address the issue, I first tried running the System File Checker tool by opening Command Prompt as an administrator and typing sfc /scannow. This helps in repairing corrupted files and could resolve problems caused by the update.
When that didn't fully resolve the issues, I opted to uninstall the update temporarily to see if it would revert the performance issues. You can do this via Control Panel > Programs > Programs and Features > View installed updates, then select the problematic update and click 'Uninstall'.
After removing it, my system's performance improved significantly. However, keep in mind that uninstalling security updates can leave your system vulnerable to threats addressed by those updates. It might be worthwhile to check Microsoft's support forums or wait for a subsequent patch that resolves these problems without needing to remove the update entirely.
If you're not comfortable with uninstalling updates or if doing so doesn't solve your problem, reaching out for more professional encourage or contacting Microsoft support may also be good next steps.
